<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>方块定位</title>
    <link rel="stylesheet" href="css/style.css">
</head>
<body>
<div id="box">
    <a class="a1" href="#">链接1</a>
    <a class="a2" href="#">链接2</a>
    <a class="a3" href="#">链接3</a>
    <a class="a4" href="#">链接4</a>
    <a class="a5" href="#">链接5</a>
</div>
</body>
</html>